Beef productivity of steers of Kalmyk breed under different types of feeding and feeding of feed sulfur

Abstract

The optimal ratio in the ration of roughage, succulent and concentrated feed allows us to increase the digesting ability of them in the animal body. In the south of the Russian Federation and especially in arid territories the set of animal feed is very limited, which determines in the Kalmyk Republic and other dry-steppe regions the need for biologically justifi ed types of fattening through the use of new combinations of feed and feed additives. The purpose of the work was to study the norms of the use of feed sulfur when feeding steers of Kalmyk breed, its eff ect on physiological and biochemical parameters, the bioconversion of feed into live weight growth and meat productivity, as well as in the assessment of fattening on hay, haylage and silage types of feeding in arid territories. The results obtained diring research give grounds to recommend the use of feeding with feed sulfur at the rate of 15 g/head/day when fattening steers of Kalmyk breed under arid conditions of the territory of Southern Russia. Feeding feed sulfur helps to increase the digestibility of feed, normalize nitrogen metabolism in the rumen, increase the live weight of steers by 17,9 kg, increase the carcass weight by 6,42 %, which allows us to get additional profi t and increase the level of profi tability by 8,0 abs.%. When choosing rations for feeding steers on fattening, it is preferable to use a haylage type of feeding. At the age of 18 months, the steers received the haylage ration had a larger live weight compared to the weight of the steers with the hay type of feeding by 1,26 %, with silage type by 0,34 %.